The colors may be brushed on greenware which is to be bisque fired before applying a covering glaze or on a mature Cone 04 (1971F, 1077C) bisque, then a covering glaze applied. For opaque coverage by brushing, the consistency of the color in the jar is correct. Velvets tolerate a wide firing range with recommended firing temperature being that of the clay used. If left unglazed, AMACO Velvets should not be used on surfaces which come in contact with food or drink. Velvets are dinnerware safe when covered by AMACO clear glazes LG-10, F-10, and HF-9 or any other dinnerware safe glaze. AMACO Velvets have only been tested and approved as dinnerware safe when applied and fired under AMACO LG-10 Clear Glaze.